1256472426 has 64 divisors (see below), whose sum is σ = 2786628096. Its totient is φ = 374510400.

The previous prime is 1256472409. The next prime is 1256472433. The reversal of 1256472426 is 6242746521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1900536 + ... + 1901196.

It is an arithmetic number, because the mean of its divisors is an integer number (43541064).

Almost surely, 2^1256472426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256472426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393314048).

1256472426 is an abundant number, since it is smaller than the sum of its proper divisors (1530155670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256472426 is a wasteful number, since it uses less digits than its factorization.

1256472426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107.

The product of its digits is 161280, while the sum is 39.

The square root of 1256472426 is about 35446.7548020972. The cubic root of 1256472426 is about 1079.0734010569.

The spelling of 1256472426 in words is "one billion, two hundred fifty-six million, four hundred seventy-two thousand, four hundred twenty-six".